I have seen people with lower GPA get accepted if you look at the past McMaster Accepted/Rejected thread! I think you definitely have a decent shot given your really high CARS score and wouldn't shy away from applying.

Hey, I think you would have a decent chance at Mac! 131 CARS is crazy good tbh (average CARS for Mac is around 129), and if you kill Casper definitely worth a shot at interview. I've seen people with lower GPA get in as interview is typically 70% of post interview score.

R﻿﻿esult﻿: "Good" Waitlisted - I think I was 7:46 or something though so maybe lower end of good..?
Stream﻿: English
wGPA: 3.93
CASPer: I think it must have went somewhat well given my 'lower' GPA; really went with my gut and winged it this time around which I think helped me be less neurotic. However, I did do extensive MMI prep the year before which must have helped.
ECs: Research, clubs, music, but really not super exceptional. I think the research awards (NSERC, and a smaller award) may have helped boost my application a bit from last year.
Interview: The interviewers stayed neutral the whole time and although some parts felt strong, the other parts perhaps not as much. However, honestly I felt proud knowing that I gave it my all and would not have changed the way I answered anything if given chance to go back.
Year: 4th year UG
Removing myself from waitlist, good luck everyone !

Result: Waitlisted
2YRS: 3.95
MCAT: 130+ each section
ECs: Research, clubs, music.... somewhat diverse but not really exceptional imo
Interview: Honestly the MMI kind of really threw me off (maybe due to lack of recent MMI practice) - I started off shaky but I feel like near the end I loosened up and was able to give lots of genuine personal answers. So probably 50/50 in terms of quality. Panel was great - the panelists seemed really relaxed and nice and legitimately laughed at one of my answers (I gave a really frank answer and they burst out laughing at it LOL). Honestly panel felt really good but not sure how much it is weighted.
In-person or Virtual: In-person
Year: 4th
Geography: IP
Will be removing myself from the waitlist. Good luck everyone!!

Result: Normal waitlist
Timestamp: 9:06
2-year GPA: 3.95
MCAT: 130+ in each section
Interview: Honestly thought I started off strong with some unique personal experiences but my answers to some scenarios may have been a bit bland. However, I am extremely grateful to have received an offer at another school, so will be declining my position in the waitlist. Good luck everyone - you guys should be proud for coming this far and I sincerely believe you will make it eventually with enough perseverance.
Year: 4th year UG

Omg I got Mac!!! I didn't know this day would ever come T_T After being waitlisted all summer last year and rejected, this feels like a dream
Thank you guys for toughing all this out with me, idk how I would've gotten through this without you guys